Sash-balance.



No. -'785,334. PATENTED MAR. 21', 1905.. J. soss. I

SASH BALANCE. APPLICATION FILED HAY 17,1904.

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No. 785,334. IPATENTED MAR. 21, 1905.

. J.S0SS. SASH BALANCE. APPLICATION FILED MAY 17, 1904.

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UNITED STATES Patented March 21, 1905.

JOSEPH SOSS, OF NEW YORK, N. Y.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent N 0. 785,334, dated March21, 1905.

Application filed May 17, 1904:- Serial No. 208,412.

To all whom it may concern:

Be it known that I, JOSEPH Soss, acitizen of the United States ofAmerica, residing at New York city, in the county. of New York and Stateof New York, have invented certain new and useful Improvements inSash-Balances, of which the following is a specification.

My invention has reference to improvements in sash-balances, andparticularly to that class in which the lowering of the sash winds up ahelical or like spring, thereby creating a certain lifting potential,which assists in raising the sash.

The object of my invention is to simplify the construction of the partsand to provide improved means for transmitting the movement of the sashto the spring.

To this end my invention consists, essentially, in the combination, withasliding sash, of a rack with oblique teeth attached to the sash, anoblique toothed gear-wheel meshing into said rack, a shaft havingsuitable bearings in the window-frame and upon which said gear-wheel ismounted, a spring coiled on said shaft and attached to the same and to astationary part, and means for yieldably pressing the gear-wheel againstthe rack.

The nature of my invention Will best be understood when described inconnection with the accompanying drawings, in which- Figure 1 representsan elevation, partly in section and part broken away, of a windowembodying my invention. Fig. 2 is a horizontal section on the line 2 2,Fig. 1. Fig. 3 is a front elevation, with part broken away, of theoperating parts in the window-frame drawn on a larger scale than thepreceding figures. Fig. 4 is a section on the line 4 4, Fig. 3. Fig. 5is a section on the line 5 5, Fig. 4. Fig. 6 is a face View of a portionof the rack. Fig. 7 illustrates an elevation, partly in section, of amodified manner of mounting the spring.

Similar letters and numerals of reference designate corresponding partsthroughout the several views of the drawings.

Referring now to Fig. 1, the letter A designates the lower sash of awindow fitted to and guided by the window-framing B in a usual manner.To each longitudinal side of the sash on the face adjacent to and facingthe window-frame is secured a metallic rack (J, having thereoninclinedteeth 1 of a pitch preferably less than forty-five degrees.These racks O are engaged by gear-wheels D D, having teeth 2,corresponding to the pitch of those of the rack, and consequently whenthe sash is raised or lowered the gear-wheels-are caused to rotate.Referring now to Figs. 1 to 5, each gear-wheel D is rigidly mounted upona shaft E, located within a suitable recess 3-in the window-framing Band extending in a vertical direction, its lower end being looselymounted in a socket in a foot F, so that it can-swing toward and fromthe sash A, or, if desired, it may be pivoted in a usual manner. Theupper end of the shaft is adjustablysecured as follows: On the shaft ismounted a box 4, in which the former turns loosely, and said box is heldfrom sliding in the longitudinal direction of the shaft by thegear-wheel D above and by a collar 5 below. The box is provided withtransverse ways 6, intowhichenter the guides 7 of a yoke 8, whichstraddles the box and is secured to the window-framing B at 9 9. It canalso be additionally secured by a plate 10, Figs. 1 and 4, whichstraddles the reduced top of the yoke and is screwed to theWindow-framing.

Between the box 4 and the yoke is placed a .usual spiral spring 11,which by its action on the box constantly forces the gear-wheel Dstoring up energy which is again expended in theraising of the sash.

It being necessary that the spring Gr have some initial tension, whichmust be maintained until the gear-wheel D is dropped into engagementwith the rack C, I provide means,

turn in the yoke 8, the shaft is held from rotating under the action ofthe spring. When the device is applied, the set-screw 12 is unscrewed torelease the shaft while the rack G and gear-wheel D are in engagement.It is of course to be understood that the shaft E may be set vertically;but I find a smoother action is obtained by inclining it. By having thegear-wheel and rack in yielding engagement breakage of teeth is avoided,also looseness or binding in running, due to shrinking or swelling ofthe wood, and smoother -running is insured.

In the modification illustrated in Fig. 7 I have shown the spring Grinclosed in a tubular casing E, which forms the shaft. Otherwise theconstruction is substantially the same as before.

I do not herein broadly claim a rack and wheel for windows, or atension-spring in connection with means for winding up the same, asthese are old and well known.

What I claim as new is 1. The combination with a sliding sash, of a rackwith oblique teeth attached to said sash, a gear-wheel meshing into saidrack, a shaft having suitablebearings and upon which shaft thegear-wheel is mounted, a tension-spring in connection with said shaft,and means for yieldably pressing the gear-wheel and rack sion-spring inconnection with said shaft, and means for yieldably pressing thegear-wheel and rack together.

3. The combination with a sliding sash, of a rack with oblique teethattached to said sash, a gear-wheel meshing into said rack, a shafthaving its lower end pivotally mounted, a movable spring-pressed boxsupporting the upper end, means for guiding and holding the box, and aspring in connection with said shaft.

4:. The combination with a sliding sash, of a rack with oblique teethattached to said sash, a gear-wheel meshing into said rack, a shafthaving its lower end pivotally mounted, a movable spring-pressed boxsupporting the upper having its lower end pivotally mounted, a movablespring-pressed box supporting the upper end, means for guiding andholding the box, a spring in connection with said shaft, and a set-screwpassing through the box and engaging theshaft for locking the twotogether.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOSEPH SOSS. Witnesses:

A. FABER DU FAUR, J r., RAENA H. YUDIZKY.

